Printing-press.



7 Patentediune [7, I902. A. E. DUWELL.

PRINTING PRESS. (Application filed Sept. 20, 1901.

(NollodeL) 2 Shani-Shoat I.

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Tajmm. vusnmomu u c No. 702,546. Patented June l7, I902. A. E. DOWELL.

PRINTING PRESS.

(Application filed Sept. 20. 1901.)

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UNITED STATES PATENT OFFICE.

.ARTHUR E. DOWELL, OF WASHINGTON, DIsTRIoT OF COLUMBIA, AssIeNOR, BYMESNE ASSIGNMENTS, TO DETROIT TRUST COMPANY, TRUSTEE, OF DETROIT,MICHIGAN, A CORPORATION OF MICHIGAN.

.PRINTING-PVIRPESS.

SPECIFICATION forming part of Letters Batent No. 702,546, dated June 17,1902.

Application filed September 20, 1901. Serial No 75,841. (No model.)

To all whom it may concern:

Be it known that I, A THU E.-DowELL,of Washington, in the District ofGolumbia,have invented certain new and useful Improvements inPrinting-Presses; andI hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawings, which form part of this specification.

This invention is an improvement in means for actuating looping-rollersof web-handlin g machinery and the looping-rollers of typeweb-perfecting printing-presses in which an intermediate part of acontinuously-moving t 5 web is intermittently retarded or stopped andstarted by means of looping bars or rollers, and the invention isparticularlydesigned for use in flat stationary bed reciprocatingimpression-cylinder web presses of the type known as Cox duplex?perfecting-presses,"

andv in the accompanying drawings the inventionis illustrated asappliedto such a press; but of course the invention maybe" used wherevermovable looping-rollers are 2 5 employedto control the movement of theweb I and wherever it is desired to provide means for varying the throwor extent of lateral reciprocating movement of a looping-roller,

so as to cause it to take up and give off more or less web in a giveninterval of time.

The object of the invention, therefore,'as applied tothe Cox duplexpress is to enable the throw of the looping-rollers to be varied while.using the san'ie cam mechanism or to vary the amount or. movement of'theweblooping rollers in accordance with the speed of the continuousin-feed and out-feed of the web, so that the press can be readilyadapted to operate upon different lengths of sheets 40 without changingthe cam mechanism which operates the looping-rollers.

In the 00x duplexpress as heretofore made but one length of sheet couldbe printed upon, the length of such sheet being controlledby 5 the speedof, the feed-rollers and the cam mechanism operating the looping-rollersbeing designedgand adapted to take care of but one length of sheet. Bymy invention the speed of the web-feed rollers in such presses may bevaried by any usual means, so as to feed in more or less web during eachrecipro-- cation of the cylinders. This means for varycry-rolls O 0, asindicated in Fig. 1.

ing the feed of the web, not forming part of the present invention andbeing old, is not illustrated herein; but of course if the feed variesthe movement of the looping-rollers must be proportionately varied,.elsethe tens'ion of the web would be lost or the web Referring to thedrawings, K K designate a set of feed-rolls and tapes, by which the webis'drawn into the press from the web-roll NV. The web to passes up overa looping.- roller Z, thence down under a guide-roller M to and throughthe printing mechanisms of the press, (not shown,)back over an upperlooping-roller M", down under an internal looping-roller Z, 'and thenceup to the deliv- The feed and delivery rollers K and O are driven at auniform speed by means of a connecting train of gearing, so that the webis continuously fed into and out of the pressat a unifornl rate. Thelooping-rollers Z Z arejournaled in a re-' ciprocating frame L, which ismoved up and down by a cam mechanism at such rate and in such time thatduring the taking of an impression the lower looping-rollerl takes uptr'ates a modification of the invention, and 'Fig. 3 illustrates anothermodification.

all the web that is fed in'by, rolls K, and during the same time theupper looping-roller Z gives out the web as it is required by thecontinuouslyrunning delivery-rolls 0. Therefore during the taking of animpression that portion of the web between the guides'M and M isstopped.

After the impression is made the frame L is lowered, so that the loop ofweb formed on the lower roll I is given ofi, while a like quantity ofweb is taken up in theelongated loop' formed by the descent of thelooping-roller Z.

Heretofore this looping-frame Z has been reciprocated by means of arace-cam D and a vibrating lever A, having a cam-roller (Z running inthe groove of cam D, the free end of lever A being connected to thelower extremity of the frame L, as in Ooxs patent, No. 501,456. By thisconstruction the looping-rollers Z 7, had given only one predeterminedextent of vibration and their throw could not be altered to accommodatevariable feed and deliveryof the web except by changing the cam D, whichwas virtually impractieal. The parts thus far described are old.

My present invention consists in providing the vibrating lever by whichthe loopingframe L is operated with an adjustable fulcrum, by shiftingwhich the throw imparted to the frame from the same cam D may bevariedi. 8., made greater or less-so that the looping-rollers may beeasily adjusted to take care of variable lengths of web fed in anddelivered from the press by the feed and delivery rollers K and O, whichare preferably driven by gearing so proportioned that the desired lengthof web will be fed and delivered by the rolls K and O for each rotationof the cam D. As shown, rolls K are driven from the cam-shaft by meansof a gear E, an intermediate E, and a pinion E on the shaft of one rollK. By substituting different-sized pinions E on the roll-shaft andshifting gear E so as to continue to mesh therewith and with gear E thespeeds of the feed-rolls can be easily varied.

As shown in Fig. 1, a lever B is pivoted just above lGVBlA, and itsfront end is connected to the lower end of frame L byalinlc b. The pivotof lever B is considerably nearer the frame L than the pivot of lever A.Upon lever A is an adjustable fulcrum a, upon which the lever B issupported. Lever A may be held down by a spring A, if desired, and leverB may be held down by a spring B, as indicated in Figs. 1 and 2. It willbe seen that lever B is vibrated by and from lever A, to which a uniformthrow is imparted by the cam D; but the throw of lever B is variable anddepends upon the position of the fulcrum a on lever A. If this fulcrumis adjusted to the extreme outerend of lever A, as indicated in Fig. 1,lever B will be moved to the least extent; but if the fulcrum a, ismoved inward toward the cam D the extent of throw of lever B will beincreased more and more as the fulcrum approaches the cam. Thisvariation in the throw of lever B is due to the fact that its pivot isso far in advance of the pivot of lever A that although the verticalmovement of the fulcrum a decreases as itis moved toward the pivot oflever A the throw of lever B is increased in a greater proportion,because the fulcrum a operates on lever B so much nearer the pivotthereof. This is obvious from the drawings and further explanationappears unnecessary. By properly adjusting the fulcrum on lever A,therefore, the looping-frame L can be given any desired.

throw between certain extremes, and thus can be adjusted to take care ofany length of web that may be handled by the feed and delivery rollersduring the impression. The proper position of the fulcrum to compensatefor varying feeds of the web can be calculated beforehand and markedupon the levers A or B, so that the pressman after putting the properdriving-pinion E on the feed-roll shaft can adjust the fulcrum a to thecorrespondingproper pointon the lever. As shown, the fulcrum may beshifted by a screw-shaft a but the particular form of the fulcrum andthe means for shifting it are not essentials of the invention.

In the modification shown in Fig. 3 the upper lever B is pivoted at itsfront end at a point beyond the frame L. Consequently when the fulcrum ais at the extremity of lever A it will impart the greatest movement tothe lever B and when the fulcrum ct is shifted toward the cam-roller (lthe throw of lever B will be lessened. The operation and effect of thedevice, however, are substantially the same as in the construction shownin Fig. 1.

In Fig 3 the secondary lever B and B is omitted, but the lever A isextensible, being provided with a telescopic portion A which is pivotedto the fulcrum A which is adjustable on the frame. As shown, it isadjustably secured to a rib A 011 the main frame. By adjusting thefulcrum A toward or from the cam-roller (Z the extent of vibration ofthe lever will be varied, and consequently the rise and fall of thelooping-frame L will be correspondingly varied. This latter modificationIdo not consider as desirable as either of the former, because a muchgreaterlinear adjustment of the fulcrum will be necessary than in theother modifications to correspondingly vary the throw of theloopingframe L.

I do not Wish to confine myself to the particular construction orapplication of the device herein described except where specificallymentioned in the claims, as the principle of the invention oncedisclosed maybe embodied in various constructions and utilized invarious machines.

Having thus described my invention, what I therefore claim as new, anddesire to secure by Letters Patent thereon, is

1. In a printing-press, the combination of web-forwarding mechanism aweb-looping roller, a vibrating lever for operating said looping-roller,a cam for operating said lever, and a fulcrum for said lever adjustableto and from the cam whereby the extent of vibration of both lever andlooper may be regulated, substantially as described.

2. The combination of changeable-speed web-forwarding mechanism aweb-looping roller, a vibrating lever operating the looping-roller, acam for vibrating said lever, and an adjustable fulcrum. below anddirectly ongaging the under side of the lever and. adjustable to andfrom the cam whereby the throw thereof produced by the cam and the throwof the looping-roller may be varied, substan ver for operating the firstpivoted lever, an'

adjustable fulcrum between the first and sec ond levers, and means forvibrating the second lever, substantially as described.

4. The combination in a printing-press of web-feeding devices-andmeansfor changing their speed, a looping-roller adapted to take up the webfed in thereby during an impression, a pivoted lever for operating thelooping-roller, a second pivoted lever and an adjustable fulcrum thereonfor operating the first pivoted lever, and means for vibrating thesecond lever, substantially as described.

5. The combination of continuously-operatingchangeable-speed web-feedingrolls, a movable looping-roller for giving an intermittent movement tothe web,'a vibrating lever for operating the looping-roller, a cam foractuating said 'lever, and an adjustable fulcru'm for said leveradjustable to and from the cam whereby the throw of the lever andconnected looping-roller may be changed in accordance with the changedspeed of the feed-rolls, substantially as described.

6. In a printing-press, the combination of the continuously-operatingweb-feeding rolls, means for changing the speed'of said rolls, a movablelooping-roller for the web, a vibrating lever for operating thelooping-roller, a second vibrating lever below the first lever, a camfor actuating .said second lever, and an adjustable fulcrum on thelatter lever engag ing the first lever whereby the throw of thelooping-rollermay be changed in accordance with the changed speed of thefeed-rolls, substantially as described.

7. In aWeb-printing press, the combination of means for continuouslyfeeding a web, a vibrating looping-roller coacting with the feed devicesin handling the Web, a vibrating lever for operating the looping-rollerand a cam for operating said lever; with means for chang-I ing the speedof the feed devices and a fulcrum for the lever adjustable toward andfrom the cam whereby the extent of the vibration thereof can be changedto compensate the movement of the looping-roller for the changed speedof the feed-rollers, substan tially as described. I

8. The combinationof continuously-acting rolls for moving a web ofpaper, and a movable looping-roller for causing an intermittent movementof part of the web, avibrating lever for actuatingthe looping-roller anda cam for operating said lever; with means for changing the speed of therolls, and a fulcrum for the lever adjustable to andfrom the cam wherebythe extent of the vibrations imparted thereto by the cam maybe varied tocompensate the movement of the loopingroller for the changed speed'ofthe feed-rollers, substantially asdescribed;

9. In a web-printing press, the combination of continuously-actingrollsfor moving a web of paper, and a movable looping-roller for causingan intermittent movement of part of the web, a vibrating lever foractuating the looping-roller; with a second uniformly-vibrating lever,and an adjustable fulcrum thereon for actuating the first'lever there 7from whereby the vibrations of the first lever may bevaried tocompensate the movement of the looping-roller for any change of speed ofthe feed-roll, and means-for changing the speed of thefeed-rolls,substantially as described. g

10. The combination in a printing-press of changeable-speed webfeedin'g" rolls, a looping-roller adapted to give up a loop of web to Ithe feeding-rollers'during an impression, a

lever foroperating the looping-roller,- andan adjustable fulcrum forsaid leverwhereby the extent of vibration of the lever and looper can beregulated in accordance with the speed of the feeding rolls,substantially as described. I d

11. The combination in a printing-press, of changeable-speed Web-feedrolls a loopingroller adapted to take up the web fedinfby thefeed-rollers during'animpression a lever for operating thelooping-roller and an adj ust-.

able fulcrum for said lever to regulate the extent of vibration thereofaccording to the speed of the feed-rolls, substantially as described. V

12. The combination of means for continuously feedingaweb of paper; aweb-looping roller coacting with the feed devices; means for changingthe speed of said devices; a 1c-.

IIO

with to alternately stop and move the inter-' v I mediate portion of theweb, a vibrating lever for operating said loopingrollers and a cam forvibrating said lever; with means for changing the speed of the feed anddelivery rolls, and an adjustable fulcrum-for the lever whereby theextent of vibration imparted thereto by the cam can be changed'so'thatit will properly move the looping-rollers in accordance with the speedof thefeed and delivery rolls. i p

In testimony that I claim the foregoing as my own I affixv my signaturein presence of two witnesses.

ARTHUR E. DOWELL. In presence of JAMES R. MANSFIELD,

T. 'H. ALEXANDER.

